A liquid crystallizes into a solid then entropy will be

Options

A. Increases
B. No change
C. Decreases
D. Becomes zero

Answer

To solve the question regarding the change in entropy when a liquid crystallizes into a solid, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Entropy**:
- Entropy is a measure of the disorder or randomness of a system. Higher entropy indicates a greater degree of disorder, while lower entropy indicates a more ordered state.

2. **States of Matter**:
- There are three primary states of matter: solid, liquid, and gas.
- **Solid**: Molecules are tightly packed in a fixed arrangement, resulting in low entropy.
- **Liquid**: Molecules are less tightly packed than in solids and can move around more freely, resulting in higher entropy than solids but lower than gases.
- **Gas**: Molecules are far apart and move freely, resulting in the highest entropy.

3. **Crystallization Process**:
- When a liquid crystallizes, it transitions from a more disordered state (liquid) to a more ordered state (solid). This means that the molecules in the liquid are rearranging into a structured form.

4. **Change in Entropy**:
- Since the process of crystallization involves moving from a state of higher disorder (liquid) to a state of lower disorder (solid), the entropy of the system decreases.
- Therefore, when a liquid crystallizes into a solid, the entropy will decrease.

5. **Conclusion**:
- The answer to the question is that the entropy will decrease when a liquid crystallizes into a solid.

### Final Answer:
When a liquid crystallizes into a solid, the entropy will decrease.

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